Method of and apparatus for sealing bag valves



Oct. 11', 1932. I A. ANDREAS 1,882,108

METHOD OF AND APPARATUS FOR SEALING BAG VALVES Filed Oct. 22. 1931 INVENTOR A flrno flrzdreas ATTORNEY Patented 0a. 11, 1932 UNITED sures a resales ARNO ANDREAS, OF MUNSTER, GERMANY METHOD OF AND APPARATUS FOR SEALING BAG VALVES Application filed October 22, 1931, Serial No. 570,332, and in Germany October 20,'1930.J i

This invention relates to a method andapparatus for sealing the flaps of'valve bags against the bag walls. As is known, the flaps in valve bags are commonly adapted to close the valve. openings by, reason of the pressure of material in the bags. However, such closures are aptto permit some of'the ma- 7 terial to escape especially during handling and shipping of the bags due to the fact that the flaps are free to move to some extent and hence do not perfectly close, the valve openings. v

The principal object of the present invention is, hence, to provide for sealing bag valves in a simple and effective manner, with-- out the necessity for additional-labor, and more particularly by means'of a device interconnected to a; bag filling machine so that it is controlled in the course of the usual motions involved in operating such machine, i. e. without additional manipulations. I have found that the desired result may be accomplished in a highly advantageous manner by applyingadhesive to the interior of the valve opening while the valve is on the spout used for conveying material into the bag, and preferablyjust as or 'j ust before the bag is removed from the spout. More specifically, I have devised means for applying adhesive to desired points in the bag, which means are preferably combined with the spout, and have provided for operation of these means bythe handle or other mechathe spout, so that the operator can cause the adhesive tobe applied and the bag to be dis- 7 charged by a single motion.

' These and other objects and'advantages will be better apparent from the following detaileddescription of a preferred embodiment of the invention, reference being had to the accompanying drawing wherein:

Fig. 1 is 1a side elevation showing one form of the present invention. Figs. 2 and 3 are enlarged vertical'sections showing details of the adhesive applying means. v s

For purposes of illustration, my lnvention -.-is shown inconnection with a bag filling machine including a hopper A, a propeller housing orjcasing G and a propeller D for, ad

tioned, the flap underside of the spout.

the weight of material in the ,shown formed adjacent the upper wall of the conduit 3 is closedbynism ordinarily used to release the bag from rangement paste may be supplied by I to the upper wall of'the bag at the inside of area, the surface of thespout is desirably bag B. I A spout 2 isshown secured to the propeller housing and communicating ,with the outlet thereof. The bag B, inF-ig. 1, is placed on the spout, that is, with thespout enterlng its valve opening, according to known practice. WVhen the bag is so posi-V which is ordinarily provided for closing the valve opening lies along the After the bag has been filled with material, and tipped so that the material pushes the fiap into position where it closes the valve, the flap ordinarily lies across the opening with its end against the upper wall ofthe bag. For present purposes I prefer to have the flap sufficiently large sothat it extends along the upper wall of the bag, when in the position just discussed, over a considerable area, so that when paste or other adhesive is applied, in accordance with the invention, to at least one of the surfaces, preferably before the valve is closed and hile the bag is on the spout, a secure joint will be formed'after the bag has been'removedfrom the spout and the material has urged the flap into closed position, bag serving to hold the two surfaces in contact while the paste dries. F or this purpose a conduit 8 is spout, the latter being provided with openings 3a leading to the conduit. The end of plug 3b,,and paste or other adhesive may be conveyed, thereto through a tube 30.

It will be appreciated that in this ars a y, or other suitable pressure, and will then pass through the openings 3a and be applied the valve opening. In order to effect proper I spreading of the adhesiveover a suitable roughened or corrugated as shown at 4," and this roughened-surface is desirably located beneath the bag clamp which is ordinarily used to maintain the bag in position on the spout. The bag clamp is shown as including an arm 5 provided with a portion 5a of're- 1 00 silient material for engaging the bag, the arm being pivoted as at 6. r

' The paste or other adhesive, should not, of course, be supplied continuously and I have shown means for controlling the supply of paste. A supply container E, suitably mounted, is employed for receiving a quantity of adhesive and a tube 3d leads from the bottom of this container to a valve which con-V trols the flow of pastefrom the container to the tube 30 and the opening- This valve may conveniently consist of; 'rotatably mounted member 7 as at 9 and having a passage 7a formed therein adaptedto place the tubes 3d and 30 in communication. When the parts are in theposition shown in Fig. l the'valve is closed, as shown ins Fig.3. A

. handle 8 is secured to the valve member 7.

;2-0WVhenthis-handleS is pulleddown it opens "spout, or immediately previously to such discharge. Moreover, it is highly advantageous to provide' for release of the bag and applica'tion of the p'asteby a'single motion on the part oftheoperator; For this purpose, I have provided an eX tenSion' IO on the'handle which is adapted to abut against pin 11-on a-rm 12 secured to arm 18, which latter is shown as formed integral-With the bag clamp 5.- i The partsare desirably arranged so that the arm 10 moves to a "position, where the valve 7 is just about'to open Whensaid-arm contajbts with the pill 211"; il nthisarrange- -ment ,1the valve thus opens just asfthe bag clamp is released; stood that the paste may be applied at a However, it will be undersomevvhat earlier stage, or just after, the reletEt thespout. The 'sequence ofoperations is, of course, readily vari'edbythe simple =expedient of altering the lost inotion between -arn110 and pin 11'. Howev'en it is-generally Fbags, a'spou-t a'elapte'cl'toenter the valve opendesirable to apply the paste while "the *top of the bag is retained against the spout the is provided a'gainst which arm 8 aisau'to- "clamp 5, for in this way asup-ei'iorspreadi-ng of the paste is apt to be secured. Forf limiting 'the travel of the valve 73a stationary stop 14;

' 'matically returned by'counterweigli t 15 after plicati'on of =release o'f the handle 8. In o'rderto provide for release o'f the bag'c'lampwvithout the appaste,. a handle =16 is shown secured to'thebag'clamp 5. The-clamp: may be automatically returned to :clamping position by counterweightl-Z .fa a The operation of the device would seemto be clear from the above descriptiolrbut it may i =1 i te i f r be summarized as follows H A bag having been placed onthe'spou'tfthe filling it passesjthroug'h the 2, thebag being retained 'in lace du'rspout material therein closes the flap, the

the un'der'side of the spout,

' l'claim z p 7 n 1v lfllhat methodpf filling iandsgaling n valve bag includes inserting iaifspgut "to spread the adhesive.

' -2 the'seaili' o-f a whiehcomprises' applying adhesive to the "valve while it is'on 'a bag fill iai g spout.

bag clamp; As the bag leaves thespout its upper wall is drawn along the roughened surface and the paste is spread over the desired area so that when the bag falls and the latter comes against the pasted surface and is securedther'et'o as the paste dries. On release of handles the partsreturn to their positions as shown in Fig. 1

It willybeunderstood t e nv n i n i not lirnited to the application of the paste to "the ta get the particularpoint illustrated, for

it lie applied to the flap itself, that is, at orat any other suitable point; Moreover, thet'enms and e x- 'pressions terms of description and not of limitation,

and have no intention, in thevu'se of such te'rms andexpressions, of excluding equivalents of the-features shown and de-f serihed or p'ortions thereot, but recognize that various mod-ificationsar'e possible-Within the scope otthe invention claimed.v i r li-llJO the valve opening applying 'adh'esive'to the interior of-the valve, while the latter :is

on the spout, an dislidi-ng thehag off the spout In a device fonfilling andsealing valve bags, a spout adapted toenterthe valve =opening, and means-to convey adhesive to the out "erf surface of the spout. I

"lease of the bag clamp, but-before the baghas 4.- In a device forfilling and-sealing valve bags ,'as pout adapted to'enter the valveopenng and means forconve'y i ng adhesiveto the -i nter ior of the valve while it is on the spout.

- 5. In a devioe for fillingia-n'd sealing valve ing -andfhaving aroughen'edsur-face vforcontact with the wallet the valve and vmeans to convey adhesive to the outer surface of the spout.

6 In a device tor filling a va'lve bag and applying adhesi've to" the valve, a spout, a

"bag clamp torfretaining the bag on the spout, j means to convey adhesive to ithe valve while the latter is on'the-s aut, means to 'control' the flow ofadhesive, 'a rnanually fop'erable Linember, and '-'c'onnect1ons -between: said member fand the controlmeans and'c lain'p, "whereby a single motion ofthefhandle efl'eotfs ran ,application of adhesiyeiand'release of the clarnp.

-7. In a device for applying adhesive to the which-I have employed are used-asb'a-g valve, the step the interior of a bag valve,

valve, said means being carried with the spout.

8. In a device for applying adhesive to a spout adapted substantially to fill the valve opening and means for conveying adhesive to the interior of the valve, said means being formed in the spout.

9. In a device for sealing a bag valve, means to enter the valve, a roughened surface on said means, means to hold the bag against said surface, and means to said surface.

10. In the sealing of a bag valve, the step which comprises applying adhesive to the interior of the valve just previous to causing the bag to be closed.

11. That method of sealing a bag valve Which comprises applying adhesive to the interior of the valve opening after the bag has been filled With material, and tipping the bag so that the material closes the valve.

12. That method of sealing a valve in a bag, which comprises inserting a filling spout into the valve, applying adhesive to the interior of the valve, from the spout immediately after the application of adhesive.

13.. That method'of applying adhesive to a to convey adhesive bag valve, which includes inserting adhesive carrying means into the valve, pressing a por tion of the valve Wall against said means, causing adhesive to flow to said pressed portion of the Wall, and substantially immediately thereafter pulling the bag ofi said means.

14:. That method of filling and sealing a valve bag, Which includes inserting a spout into the valve, pressing a portion of the valve wall against said spout, applying adhesive to the interior of the valve during said pressing, and substantially pulling the bag off the spout.

15. In a device of the class described, a bag filling spout adapted to enter the valve opening of a bag, means for clamping the bag on said spout, and means for causing adhesive to be supplied to the valve opening in said bag and concommitantly causing operation of the clamp to release the bag from the spout.

16. In a machine for filling valve bags, a spout having a passageway for material entering the bag, and a passageway for adhesive to be applied to the bag.

In testimony whereof, I have signed my name to this specification this 1st day of October, 1931.

ARNO ANDREAS.

and removing .the bag immediately thereafter 

